Construction method of dewatering well in underground concrete structure

Abstract

The invention discloses a closing method of a dewatering well in an underground structure, which is used for a dewatering well arranged at the bottom of the underground structure in a foundation pit. The method comprises the following steps of: arranging a dewatering pipe in the dewatering well, connecting the lower port of the dewatering pipe with a water pump, drawing out the upper port of the dewatering pipe from one side through the inside of a concrete base plate to be cast, moving the upper port of the dewatering pipe upwards along the foundation pit, and placing in a position higher than the underground water level; or drawing the upper port of the dewatering pipe through the inside of the concrete base plate to be cast, moving upwards with a concrete wall to be cast, which is connected with the concrete base plate into a whole, placing in a position higher than the underground water level, then starting a water pump to carry out dewatering operation, casting the concrete base plate and a side wall, stopping the dewatering operation after the concrete is set to a specified strength, and finally blocking the upper port of the dewatering pipe. The invention not only reduces the groundwater pressure at the closing part of the dewatering well, but also simplifies the closing process of the water drain pipe, thereby avoiding the water leakage of the structure as a result of the incorrect closing of the water drain pipe.

Description

technical field [0001] The invention relates to a construction method for keeping the underground foundation structure dry in the construction industry, in particular to a construction method for keeping the underground foundation structure dry by preventing and cutting off the underground water flow in the underground concrete structure. Background technique [0002] With the increase of high-rise buildings, there are more and more underground projects in construction, and the groundwater level of many construction sites is relatively high. In order to meet the construction requirements, well point precipitation is required on the construction site. In order to achieve precipitation, precipitation wells are usually arranged within the scope of the underground concrete structure, and the precipitation cannot be stopped before the construction of the underground structure is completed. After the construction of the bottom plate of the underground structure is completed, that ...

AI Technical Summary

Problems solved by technology

Due to the high pressure of groundwater, a slight omission in this construction method will cause water leakage in the structure due to improper sealing of the drainage pipe.

Especially when the groundwater level is high and the bearing pressure is high, the sealing concrete is often unable to withstand the pressure of the groundwater because the strength of the sealing concrete is not reached, or the new and old concrete stubble at the sealing place is not tightly connected, causing the structure to leak, and once this happens, it is difficult to deal with it.

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